RuterOS (6.40.4) drops packets with ToS!=0

RouterOS General
1

I am observing the issue where my router drops any packets with ToS!=0.
There is not a such problem for packets with ToS=0.

I tried this:
ip firewall mangle print
Flags: X - disabled, I - invalid, D - dynamic
0 chain=prerouting action=change-dscp new-dscp=0 passthrough=no log=no log-prefix=""but did not help.

Can help with it? How to troubleshoot it further?

2

Hi Dexter, Can you explain a little bit more what is the problem or what you want to achieve?
Are you saying that your router is dropping packets with ToS different than 0?
Or you want your router to drop packets with ToS different than 0?
It is not clear to me.